MUELLER

MUELLER
System Protection Devices
Pressure Relief Valves
Straight Thru - NPTFE Inlet to Flare
Angle - NPTFE to Flare
Atmospheric - NPTFE Inlet
Straight Thru - NPTFE Inlet to NPTFI Outlet
Straight Thru-Straight Thread Inlet to NPTFI Outlet
Prefixes for standard settings are:
MUELLER
C
ASME VALVE INLET (A) (in) OUTLET (B) (in) (in) (cm) DISCHARGE
TABLE
(lb) (kg)
A 15501 1⁄4 3⁄8 2-21/32 6.75 A 0.19 0.09
A 15502 3⁄8 3⁄8 2-13/16 7.14 B 0.33 0.15
A 15503 3⁄8 1⁄2 3 7.62 B 0.36 0.16
A 15504 1⁄2 5⁄8 4-3/16 10.64 C 0.84 0.38
B 33752 1⁄4 3⁄8 2-13/16 7.14 B 0.32 0.14
B 33753 1⁄4 1⁄2 3 7.62 B NA NA
C D WT/ EA
ASME VALVE INLET (A) (in) OUTLET (B) (in) (in) (cm) (in) (cm) DISCHARGE
TABLE
(lb) (kg)
B 33746 1⁄4 3⁄8 2-3/8 6.03 1-1/8 2.86 B 0.30 0.14
B 33754 1⁄4 1⁄2 2-7/16 6.19 1-5/16 3.33 B NA NA
A 15512 3⁄8 3⁄8 2-3/8 6.03 1-3/8 3.49 B 0.36 0.16
A 15513 3⁄8 1⁄2 2-3/8 6.03 1-11/32 3.41 B 0.38 0.17
A 15514 1⁄2 5⁄8 4-3/32 10.40 1-9/16 3.97 C 0.98 0.45
C
ASME VALVE INLET (A) (in) B (in) (in) (cm) DISCHARGE
TABLE
(lb) (kg)
A 15508 1⁄8 1-7/8 3⁄4 1.91 A 0.12 0.05
A 15509 1⁄4 2 3⁄4 1.91 A 0.13 0.06
A 17430 3⁄8 2-1/8 1 2.54 B 0.24 0.11
B 33755 1⁄4 2-1/8 1 2.54 B NA NA
C
ASME VALVE INLET (A) (in) OUTLET (B) (in) (in) (cm) DISCHARGE
TABLE
(lb) (kg)
A 17840 1 1 4-9/16 11.59 E 1.95 0.88
A 17834 1-1/4 1-1/4 5 12.70 F 2.00 0.91
A 15506 3⁄4 3⁄4 5 12.70 D 1.49 0.68
C
ASME VALVE INLET (A) (in) OUTLET (B) (in) (in) (cm) DISCHARGE
TABLE
(lb) (kg)
B 34444 7⁄8 -14 UNF 2A 3⁄4 5 12.70 D 1.53 0.69
B 34519 1-5/16 -12UNF2A 1 4-3/8 11.11 E 1.37 0.62
B 34580 1-5/8 -12UNF-2A 1-1/4 5 12.70 F 2.00 0.91
AD/BD= 235 psig. AH/BH = 400 psig.
AE/BE = 300 psig. AI/BI = 425 psig.
AG/BG = 350 psig. AJ/BJ = 450 psig.
For valves furnished at non-standard settings, use part numbers as listed in specification charts
and indicate exact pressure setting.
520